Large Diameter Steel Pipe

Outer Diameter (OD): 609.6mm – 1220mm (24″–48″)

Wall Thickness: 10mm – 120mm

Process: Hot Rolled / Hot Expanded Seamless (SMLS)

Key Standards: API 5L PSL2, ASTM A106 Gr.B, ASTM A335, EN 10216

Description

We are the leading manufacturer and stockist of large-diameter steel pipe in China.

Production Capacity of Hot-Expanded Seamless Steel Pipes and Bigger Heavy Seamless Steel Pipes:
5 sets of hot expansion machinery.
Straitening machines & annealing heat treatment equipment.
50,000 tonnes/month.
Size Range of Our Bigger OD Steel Pipes:
OD 12"-48" (323.9 mm-1,200 mm).
WT SCH10-SCH100 (8mm-60mm).
L 1-12 metres.

The large pipe is made using the hot expanding production process. It is widely applied in conveying fluid, such as petroleum, natural gas, coal gas, water, and some solid materials; also ship-building, chemical fertilizer equipment, gasoductos, oleoductos, acueductos, alcantarillado, aqueduct construction, etc.

Further information about our Large Diameter Steel Pipe:

1. Executive standards of hot expanding seamless pipe: ASTM A335, ASTM A519, SAE 4340, SAE 4140, SAE 1045, ASTM A333, ASTM A106/A53, API 5L, GOST 8731, GOST 8732, DIN, JIS, etc.
2. Specification range
OD: 12"-47"
WT: SCH10-SCH100
3. Testing for the hot expanding seamless pipe: eddy current or hydro-static or ultrasonic or intergranular corrosion, etc.
4. Packing: Bundles and seaworthy packing, as required.

PETROL STEEL CO., LTD. has specialised in the manufacturing and export of Large Diameter Steel Pipe, pipe fittings, and flanges for over two decades. Leveraging a mature international trade network and rigorous quality control capabilities, we consistently provide pipeline system solutions—compliant with API, ASTM, and DIN standards—to key markets across the Middle East, Africa, and Southeast Asia. PETROL STEEL CO., LTD's exports of Seamless Steel Pipes are heavily concentrated in energy and infrastructure projects within countries along the "Belt and Road" initiative—specifically the UAE, Kuwait, Saudi Arabia, Oman, Iraq, Nigeria, Algeria, Indonesia, Thailand, and Vietnam. Over 20 years, PETROL STEEL has cultivated deep expertise and established stable cooperative relationships in these core markets.

Our range of large-diameter steel pipe covers outer diameters from NPS 2″ to 47″ (with capabilities to produce even larger sizes) and wall thicknesses ranging from SCH 40 to XXS. Available materials include ASTM A106 Gr.B, ASTM A53, and API 5L Gr.B–X70, as well as API 5CT OCTG casing and tubing. Additionally, we supply alloy pipes (ASTM A335 P11/P22/P91), duplex stainless steel, and CRA corrosion-resistant clad pipes, which are designed to meet the various operational needs of long-distance oil and gas pipelines, refinery and petrochemical facilities, power plant boilers, and large-scale water diversion projects. All products are made according to ASME B36.10, EN 10216, and DIN 2448 standards and come with an EN 10204 3.1 and 3.2 Material Test Certificate (MTC) upon delivery.

Tailoring our approach to the specific oil and gas development characteristics of Middle Eastern producers (such as the UAE, Kuwait, Saudi Arabia, and Iraq) and North African nations (Algeria and Egypt), we have specifically enhanced our process capabilities regarding sour service resistance (NACE MR0175), high-temperature and high-pressure endurance, and anti-corrosion coatings (3PE/3PP/FBE). We serve as a long-term supplier for both offshore and onshore oil companies, as well as EPC contractors. For water infrastructure and industrial park projects in West Africa (Nigeria), East Africa (Kenya, Tanzania), and Southeast Asia (Indonesia, Vietnam, Thailand), we offer CIF-to-port quotations and flexible consolidated shipping solutions to help shorten procurement cycles.

The Large Diameter Steel Pipes from PETROL STEEL CO., LTD meet the standards of API 5L/5CT, ISO 9001, and CE/PED. Our company has advanced testing facilities for spectral analysis, ultrasonic inspection, and eddy current flaw detection, so every batch of large-diameter seamless pipe is fully traceable. Leveraging our dedicated export department and extensive overseas service network, we have successfully supplied materials for over 350 international projects with zero major claims. We are well-versed in the documentation requirements for customs clearance at major destination ports (such as SASO, COC, and SGS inspection mandates), making cross-border procurement more efficient and worry-free for our clients.

Whether for long-distance oil and gas pipelines, municipal water supply mains, thermal power plant piping, or wear-resistant mining pipelines, PETROL STEEL is committed to serving as your trusted, long-term partner for piping materials—offering consistent quality, competitive ex-factory pricing, and professional after-sales technical support. We welcome your inquiries regarding specific specifications, current inventory, and project quotations!

We can produce the followings items
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We supply a wide range of hot expanded pipe, carbon hot expanded pipe, and alloy hot expanded pipe at factory price.
For more details of our large diameter seamless steel pipe, please feel free to contact us timely.